Proportional gas and air mixer



C. H. WERLIN.

PROPOHTIONAL GAS AND AIR MIXER.

v APPLICATlON FILED NOV. H }9I8. 1,320,107.

.Pzltented Oct. 98, 1919.

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CHARLES H. WERLIN, OF ,(OLUMBUS, OHIO.4

PROPORTIONAL GAS D AIR MIXER.

Specication of Letters Patent.

'Patented Oct. 28, 1919'.

Application viletl November 11, 1918, Serial No. 261,949.l

To all whom t may conce/rn.'

Be 1t known that I, CHARLES H. lNEnLIN, a citizen of the United States, residing-at vColumbus, in the county of Franklin and to give the proper mixture of air and gas to eti'ect complete combustion and, at the same time; to obtain the highest thermal ei'liciency.

The main object of my invention resides in astructure which is readily adaptable to varying conditions of gas pressure and drat't whereby the mixture and flame may be properly regulated as a'bove described. As a corollary to this, the structure may also be made to adapt itself to varying sizes of burner pipes within a predetermined range, In this structure, I contemplate providing a mixing shell having the usual air openings oiuftheir e uivalent and a valve mechanism leading into this shell together with means operating automatically with the opening valve for increasing the eiective size of the air openings and additional means whereby the maximum size of these air openings regulated byl their Width measurement may be initially Set or may be varied at various times to suit changing conditions of draft and gas pressure.

One embodiment for carrying outl the above principles is illustrated in the accompanying sheet of-` drawings wherein similar characters of reference designate corresponding parts and wherein,

Figure 1 is a vertical longitudinal section taken through one form of admission valve and mixer shell with my improvements applied thereto.

Fig. 2 is a section taken on line 2-2 of Fig. 1,

Fig. 3 is a face view of the manually operated shutter whereby the maximum eeetive size 'of themixer air openings may be adj usted as desired and,

Fig. 4 is a face View of the shutter which operates automatically in conjunction with the Valve mechanism to regulate the effective size of the mixer air openings.

In Fig. 1, the regulating valve is designatedin its entirety by the reference numeral 1 and comprises a central hollow plug Qwhich may be oscillated by means ot' the handlei. i

leading into the interior of the plug 2 to supply gas thereto and this gas is then emitted out ot the end of the nozzle 5. A mixer shell 6 is `suitably mounted in connection with the valve mechanism so that the discharge end of the Valve is located Within the shell as shown and this shell also is adapted to fit over the blirner pip 7 and held in place thereon by means of a set screw 8. The burner or face 0f the Shell o is provided with a pair of air openings whereby air is supplied to the entry gas. A shutter l() ot' the form shown inpFig. 4 wherein opposed open spaces 11 are provided is rigidly mounted in connection with' the valve. mechanism and as shown in Fig.y l is rigidly mounted in connection with the valve plug 2. This rigid morinting is accomplished by clamping the shutter 10 between the washers 1Q and 13, the clamping eiiect being produced by means of the nut 14 and the lock nut 15, the latter carrying the nozzle 5. By suitably tightening the nuts la and 15, the washer 13 clamps the shutter 10 in connection with the washer 12 so that operation of the valve plug 2 also causes movement of the shutter 10. This shutter is located upon the valve wlug in such manner that the eii'ective size et the mixer air openings 9 are increased as the valve is opened.

To adapt the structure to varying gas pressures and also to varying Sizes of pipes 7, it being understood that these latter may be pushed up Aor down as desired, there is provided an additional shutter 16 shown detached in Fig, 3. This shutter is mounted rotatably upon the washer 'l2 and is provided with an operating handle 17 operatively projecting through the slotted portion 18 ot the mixershell This shutter is provided with a pair of openings 19 of a size gradually increasing in width from the small end to the large end. ln additionv` the outer edges 20 of these openings are formed on a curve of gradually increasing radius so that no matter what may be the positionot the shutter 16. the effective openings through the mixer shell will be of segmental eircular form altlumgh thevariation in effective size is obtained hy thus vary: 'j +he. effective width. This is rendered possible by making the edges Q1 and A connection 4 is shown 2 2 of the openin s 9 inthe mixer face of 'a wntour concentric with the edges 20 of the shutter 16.

From the foregoing description, taken in connection. with the accompanying sheet of drawings, it will be apparent that theshutter 16 may be initially set to produce any desired e'ective size of air opening through "the mixer shell. The eiiective sizes of these openings is governed 1n a great measure by the gas pressure, barometric condition, and also the. size of burner' or pipe that the valve is adapted to supply. Having determined the proper position of the shutter 16 the shutter 10 is brought into play to operate automatically With the opening of the valve 1 to gradually increase the size of the air openings as previously determined by the location'of the shutter 16 during the opening movement of this valve, It Will thus be apparent that for a small supply of shutter arranged to vary the effective Width hut independent of the.

of said air openings operation of said valve mechanism.

2. in a gas valveA and mixer structure, a mixer'shell .having air openings, a valve mechanism leading into said shell, a shutter movable with the opening movement of said mechanism and coperating With said air openings to `increase their eifective size as the valve mechanism is opened and an additional shutter rotatably mounted with respect to said shell and operable from the exterior of the shell to also vary the eilective width of said air openingsventirely independent of said first named shutter and the opening movement of said mechanism.

3. ln a gas valve and mixer structure, a mixer shell having air openings, a valve mechanism leading into said shell, a shut' ter movable with. the opening movement of said mechanism andcoperating with said air openings to increasetheir effective size as the valve mechanism is opened, an additional shutter rotatably mounted with respect to said shell and provided with openings gradually increasing in Width from one end to the other to coperate with said shell air openings, and a handle structure located exteriorly of the shell for setting said last named shutter at any desired position irrespective of the operation of said valve mechanism.

le ln a gas valve and mixer structure, a mixer shell having air openings, a valve mechanism leading into said shell, means operating automatically With the opening or' said mechanism, for increasing the effective size of said openings, and additional means manually operated and entirely independent of said first named means for also varying the eiiiective Width of said shell. openings. i ln testimony whereof l aiiiX my signature'.

ennemis H. Winsum. 

